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[v4,04/12] doc: capsule: Document the new mechanism to embed ESL file into dtb

Message ID 20230715134533.2025893-5-sughosh.ganu@linaro.org
State Superseded
Headers show
Series Integrate EFI capsule tasks into u-boot's build flow | expand

Commit Message

Sughosh Ganu July 15, 2023, 1:45 p.m. UTC 
Update the document to specify how the EFI Signature List(ESL) file
can be embedded into the platform's dtb as part of the u-boot build.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
Changes since V3: None

 doc/develop/uefi/uefi.rst | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)
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Patch

diff --git a/doc/develop/uefi/uefi.rst b/doc/develop/uefi/uefi.rst
index 6626ceec52..3d07aa33b8 100644
--- a/doc/develop/uefi/uefi.rst
+++ b/doc/develop/uefi/uefi.rst
@@ -522,20 +522,16 @@  and used by the steps highlighted below.
             ...
     }
 
-You can do step-4 manually with
+You can perform step-4 by defining the Kconfig symbol
+CONFIG_EFI_CAPSULE_ESL_FILE. Once this has been done, the signature
+node can be added to the u-boot.dtsi file. For reference, check the
+u-boot.dtsi file for the sandbox architecture. If this node has not
+been added to the architecture's u-boot.dtsi file, this needs to be
+done. The node has currently been added for the sandbox and arm
+architectures' in the u-boot.dtsi file. Once the u-boot.dtsi file has
+been added with the signature node, the esl file will automatically
+get embedded into the platform's dtb as part of u-boot build.
 
-.. code-block:: console
-
-    $ dtc -@ -I dts -O dtb -o signature.dtbo signature.dts
-    $ fdtoverlay -i orig.dtb -o new.dtb -v signature.dtbo
-
-where signature.dts looks like::
-
-    &{/} {
-            signature {
-                    capsule-key = /incbin/("CRT.esl");
-            };
-    };
 
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